N-Bromosuccinimideand Iodine Catalyzed Highly Efficient Deoxygenation ofSulfoxides to Thioethers Using 3-Mercaptopropionic Acid under Mild ReactionConditions
在手性烷基芳基硫醚与N-氯甲苯磺酰胺或t- BuOCl,然后由TsNH - Na +反应均导致不等量的产物非对映异构体反应中,研究了亚砜亚胺和亚砜形成的立体化学。通过光谱方法和立体定向反应确定构型,并通过hplc测量非对映异构产物分布。讨论了结果,并提出了产物控制步骤的反应途径。亚砜由sulph类中间体通过水解转化而形成,而亚硫亚胺则根据N-亲核试剂的攻击方式在硫上具有保留或转化构型。在邻位反应中-羧基取代的硫化物,亚砜亚胺和亚砜都由环状的酰氧基ium中间体形成,硫的构型反转。
One-pot synthesis of α-phenylsulfinyl ketones by reaction of phenyl benzenethiosulfinate with enolate anions, and synthesis of sulfoxides and sulfides by its reaction with Grignard reagents
作者:Jerome Fakhry、David H. Grayson
DOI:10.1016/j.tet.2017.12.028
日期:2018.2
give α-phenylsulfinyl ketones directly, together with minor amounts of α-phenylsulfanyl ketones. These are easily separated by forming the water-soluble sodium salts of the sulfinyl compounds. Grignardreagents also react with phenyl benzenethiosulfinate, to give mixtures of sulfoxides and sulfides.
Pinacol as a New Green Reducing Agent: Molybdenum- Catalyzed Chemoselective Reduction of Sulfoxides and Nitroaromatics
作者:Nuria García、Patricia García-García、Manuel A. Fernández-Rodríguez、Rubén Rubio、María R. Pedrosa、Francisco J. Arnáiz、Roberto Sanz
DOI:10.1002/adsc.201100877
日期:2012.2
Pinacol is disclosed as a newchemoselective and environmentally benign reducing agent for sulfoxides and nitroaromatics assisted by readily available dichlorodioxomolybdenum(VI) complexes as catalysts. A wide range of substrates including those bearing challenging functional groups has been efficiently and selectively reduced with acetone and water being the only by-products of these reactions.
REACTION OF ALKYL ARYL SULFOXIDE WITH METHYL PHENYL<i>N</i>-CHLOROSULFOXIMIDE. DIRECT SYNTHESIS OF OPTICALLY ACTIVE α-CHLORO SULFOXIDE WITH OPTICALLY ACTIVE<i>N</i>-CHLOROSULFOXIMIDE
Treatment of a few alkyl aryl sulfoxides with methyl phenyl N-chlorosulfoximide resulted in the quantitative formation of α-chloro sulfoxides. When the opticallyactive methyl phenyl N-chlorosulfoximide was used, the α-chloro sulfoxides having optical activity on the sulfinyl sulfur were obtained from the corresponding sulfoxides.
One-Pot Sulfoxide Synthesis Exploiting a Sulfinyl-Dication Equivalent Generated from a DABSO/Trimethylsilyl Chloride Sequence
作者:Danny C. Lenstra、Vincent Vedovato、Emmanuel Ferrer Flegeau、Jonathan Maydom、Michael C. Willis
DOI:10.1021/acs.orglett.6b00712
日期:2016.5.6
sulfinate intermediate. In situ conversion of the sulfinate to a sulfinate silyl ester, using TMS-Cl (trimethylsilylchloride), generates a second electrophile, allowing addition of a second organometallic reagent. Organolithium or Grignard reagents can be employed, delivering sulfoxides in good to excellent yields.
Rapid, Efficient and Chemoselective Deoxygenation of Sulfoxides to Thioethers Using NaBH<sub>4</sub>/I<sub>2</sub>
作者:Babak Karimi、Daryoush Zareyee
DOI:10.1055/s-2003-37349
日期:——
Sodium borohydride in the presence of iodine in anhydrous THF converts a range of structurally different sulfoxides to their thioethers in excellent yields. It has been found that chemoselective deoxygenation of sulfoxides can be achieved in the presence of other reducible functional groups such as esters, nitriles and double bonds.